I've spent 20 years in the creative industry in branding and all forms of design as a 'suit'/strategy/direction. Inclusive of managing the creative arm of a PR firm, I also spent a couple of years in design recruitment at some point. I used to get a lot of people wanting to break into design.
Firstly, PR and design are not compatible. There is no crossover because PR is all about a voice and a story, not how something looks or feels.
if your skills are writing, then focus on that, be creative in that realm.
To break into an unrelated area requires a complete change in thinking. Journalism - I feel - is in the opposite direction again to where you say you want to be.
to get to your goal, you need to make interim moves to get there - stepping stones if you will.
your best bet is to make a move into marketing, to take your writing skills and 'sell' client ideas, establish tones of voice for them and bring brands to life that way. Digital marketing, corporate blogging, managing a client's social media, content research and development, marketing collateral etc.
Ideally, you could then work with a creative/designer to give you visuals to use. you will need to know what information they need to have to do what they do and manage that process too, providing the link between client and creative.
If you were sat in front of me with my design recruitment head on, that is what I would suggest - if I saw the promise there.
Qualities you would need - the ability to present your thoughts and ideas, confidence to speak to clients and willingness/capacity to pick things up quickly and think on your feet.